10 Technical documentation

When designing a SRP/CS, its designer shall document at least the following information relevant to the safety-related part:
- safety function(s) provided by the SRP/CS﹔
- the characteristics of each safety function﹔
- the exact points at which the safety-related part(s) start and end﹔
- environmental conditions﹔
- the performance level (PL〕﹔
- the category or categories selected ﹔
- the parameters relevant to the reliability (MTTFo, DC, CCF and mission time〕﹔
- measures against systematic failure﹔
- the technology or technologies used ﹔
- all safety-relevant faults considered﹔
- justification for fault exclusions (see ISO 13849-2）﹔
- the design rationale (e.g. faults considered, faults excluded）﹔
- software  documentation ﹔
- measures against reasonably foreseeable misuse.

NOTE       In general, this  documentation is foreseen as being for the manufacturer's internal purposes and will not be distributed to the machine user.